/
detector.go
194 lines (154 loc) · 4.07 KB
/
detector.go
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package detector
import (
"context"
"io/ioutil"
"sync"
// We will support these formats
_ "image/gif"
_ "image/jpeg"
_ "image/png"
_ "github.com/lmittmann/ppm"
_ "golang.org/x/image/bmp"
emptypb "github.com/golang/protobuf/ptypes/empty"
config "github.com/spf13/viper"
"go.uber.org/zap"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"github.com/snowzach/doods/conf"
"github.com/snowzach/doods/detector/dconfig"
"github.com/snowzach/doods/detector/tensorflow"
"github.com/snowzach/doods/detector/tflite"
"github.com/snowzach/doods/odrpc"
)
// Detector is the interface to object detectors
type Detector interface {
Config() *odrpc.Detector
Detect(ctx context.Context, request *odrpc.DetectRequest) (*odrpc.DetectResponse, error)
Shutdown()
}
// Mux handles and routes requests to the configured detectors
type Mux struct {
detectors map[string]Detector
authKey string
logger *zap.SugaredLogger
}
// Create a new mux
func New() *Mux {
m := &Mux{
detectors: make(map[string]Detector),
authKey: config.GetString("doods.auth_key"),
logger: zap.S().With("package", "detector"),
}
// Get the detectors config
var detectorConfig []*dconfig.DetectorConfig
config.UnmarshalKey("doods.detectors", &detectorConfig)
// Create the detectors
for _, c := range detectorConfig {
var d Detector
var err error
m.logger.Debugw("Configuring detector", "config", c)
switch c.Type {
case "tflite":
d, err = tflite.New(c)
case "tensorflow":
d, err = tensorflow.New(c)
default:
m.logger.Errorw("Could not initialize detector", "name", c.Name, "type", c.Type)
continue
}
if err != nil {
m.logger.Errorf("Could not initialize detector %s: %v", c.Name, err)
continue
}
dc := d.Config()
m.logger.Infow("Configured Detector", "name", dc.Name, "type", dc.Type, "model", dc.Model, "labels", len(dc.Labels), "width", dc.Width, "height", dc.Height)
m.detectors[c.Name] = d
}
if len(m.detectors) == 0 {
m.logger.Fatalf("No detectors configured")
}
return m
}
// GetDetectors returns the configured detectors
func (m *Mux) GetDetectors(ctx context.Context, _ *emptypb.Empty) (*odrpc.GetDetectorsResponse, error) {
detectors := make([]*odrpc.Detector, 0)
for _, d := range m.detectors {
detectors = append(detectors, d.Config())
}
return &odrpc.GetDetectorsResponse{
Detectors: detectors,
}, nil
}
// Shutdown deallocates/shuts down any detectors
func (m *Mux) Shutdown() {
for _, d := range m.detectors {
d.Shutdown()
}
}
// Run a detection
func (m *Mux) Detect(ctx context.Context, request *odrpc.DetectRequest) (*odrpc.DetectResponse, error) {
if request.DetectorName == "" {
request.DetectorName = "default"
}
detector, ok := m.detectors[request.DetectorName]
if !ok {
return nil, status.Errorf(codes.NotFound, "not found")
}
// If file is specified, load the data from a file
var err error
if len(request.File) != 0 {
request.Data, err = ioutil.ReadFile(request.File)
if err != nil {
return nil, status.Errorf(codes.NotFound, "could not open file %s", request.File)
}
}
response, err := detector.Detect(ctx, request)
if err != nil {
return response, err
}
m.FilterResponse(request, response)
return response, nil
}
// Handle a stream of detections
func (m *Mux) DetectStream(stream odrpc.Odrpc_DetectStreamServer) error {
// Handle cancel
ctx, cancel := context.WithCancel(stream.Context())
go func() {
select {
case <-ctx.Done():
case <-conf.Stop.Chan():
cancel()
}
}()
var send sync.Mutex
var ret error
for ctx.Err() == nil {
request, err := stream.Recv()
if err != nil {
return nil
}
m.logger.Info("Stream Request")
go func(request *odrpc.DetectRequest) {
response, err := m.Detect(ctx, request)
if err != nil {
// A non-fatal error
if status.Code(err) == codes.Internal {
send.Lock()
ret = err
cancel()
send.Unlock()
return
} else {
response = &odrpc.DetectResponse{
Id: request.Id,
Error: err.Error(),
}
}
}
send.Lock()
stream.Send(response)
send.Unlock()
}(request)
}
return ret
}